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Gas cell

A gas chamber, gas technology, applied in the field of gas chamber, can solve the problem of not mentioning the preferred structure of the coating and so on

Inactive Publication Date: 2015-12-30
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In Patent Document 1 and Non-Patent Documents 1 and 2, there is no mention of a preferred configuration of the coating for preventing spin polarization decay

Method used

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Embodiment Construction

[0027] 1. Structure

[0028] figure 1 It is a block diagram showing the configuration of the magnetic measuring device 1 according to one embodiment. The magnetism measuring device 1 is a living body state measuring device that measures a magnetic field generated from a living body such as a magnetic field generated from the heart (magnetism) or a magnetic field generated from the brain (magnetism) as an indicator of a living body state. The magnetic measurement device 1 has a gas cell array 10 , a pump light irradiation unit 20 , a probe light irradiation unit 30 , and a detection unit 40 . The gas cell array 10 has a plurality of gas cells. Alkali metal gas (for example, cesium (Cs)) is sealed in the plurality of gas cells. The pump light irradiation unit 20 outputs pump light (for example, light with a wavelength of 894 nm corresponding to the D1 line of cesium) that interacts with the alkali metal atoms. The pump light has a circularly polarized light component. When ...

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Abstract

A gas cell (11) includes a cell main body having an internal space defined by inner walls, a gas of alkali metal or hydrogen sealed in the internal space, and a coating layer formed at least on part of the inner walls using a material having a long-chain molecule structure, wherein molecules more than half of molecules forming the coating layer are perpendicularly oriented with respect to the inner walls.

Description

technical field [0001] The invention relates to a gas chamber with a coating on the inner wall. Background technique [0002] Devices using spin polarization (spin polarization) of gas atoms enclosed in a gas cell, such as a magnetometer and an atomic oscillator, are known. In the above device, there is a problem that the spin polarization is attenuated when the atoms in the gas chamber collide with the inner wall of the chamber. In order to cope with this problem, a technique of coating the inner wall of the gas chamber with paraffin is known (Patent Document 1 and Non-Patent Documents 1 and 2). [0003] Patent Document 1: Japanese Unexamined Patent Publication No. 2013-7720 [0004] Non-Patent Document 1: E.B.AlexandrovandM.V.Balabas, "Light-induceddesorptionofalkali-metalatomsfromparaffincoating", PhysicalReviewA66, 042903 (2002) [0005] Non-Patent Document 2: N.Castagna, G.Bison, G.DiDomenico, A.Hofer, P.Knowles, C.Macchione, H.SaudanandA.Weis, "A large samples study...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/26G01R33/26
CPCG01N24/006G01R33/0322G01R33/26G01R33/282Y02E60/32F17C13/00
Inventor 长坂公夫
Owner SEIKO EPSON CORP